I will also have to check the 10 or so black mugs I have around here somewhere as in all honesty never given them a second thought before,always assumed that the elusive mug would be green so never checked the dates.
My set looks to have been together a long long time and a hell of a job to get in and out of the carrier. Another reason for the re design as Im sure the later carrier was slightly bigger?
I have taken a few gambles lately on Ebay(this and the RAC Holster) and both worked in my favour,they dont always do so. All I bought this set was for the bottle and carrier as seeing the mug was black I assumed it would be an 80s one so was very surprised when it arrived,and cheap as well.